where to buy replacement lcd tv screens
First of all, we must clarify what is the most important thing on TV. The first is the viewing experience, that is, the picture quality. The second is the experience in the use process, that is, the operation is simple and easy to use and smooth and not stuck, the film source is rich, most of you want to watch, you can install third-party software to expand the film source and functions, and there are as few advertisements as possible.
Therefore, the principle and direction of purchase are:
First, the image quality processing technology of TV
Second, the hardware configuration and performance of the TV
Third, the ease of use of the TV operating system/source richness
From black-and-white TV to color TV, from CRT to plasma, and now LCD OLED from 2K to 4K 8K Now most people use LCD TVs at home! Did you accidentally break the TV screen? (80% of them are played by my own children) Are you particularly troubled by the after-sales price that is close to the TV screen replacement (I heard that a certain brand of TV screen replacement exceeded the price of the TV itself) It is a pity to sell scraps, and the screen replacement is almost the same New machines. Many people may not know that there are many channels to change the screen besides after-sales. Of course, there are many people who know that there are other channels to change the screen, but they are afraid to change the parts, and the replacement is a copycat screen, or the replacement is not the original screen!
First of all TV parts! The TV is really worthless except for the parts inside the screen. It's not worth stealing anything from your TV, and it's useless to bring it. There are also cottage screens. There is no copycat for LCD screens. There are only a few brands of common LCD screens, and there are very few countries that can produce them! There is also the most important point of how there should be copycats and the most worrying point. I am afraid that it is not the original brand screen! ! ! Many TVs with LCD screens can be substituted, but it also depends on whether it is worthwhile to get other models or brands to substitute. For example, if your TV screen is not lacking in the market, then there is no need to bother to change to substitutes. If it is lacking, yes. Many screens of other models or brands are used instead, so this worry is correct. But substitutes are still in the minority! And since it can be substituted, the effect will not be different, and some substitutes will have better effects than the original factory, even if there is a difference. At least 90% of people can't see the difference. TVs with 3D functions can't be replaced, so don't worry! correct. There is also a repair screen for the disassembly screen. This is not linked to the display effect. It is the same. It will not be said that the display effect of the repair or disassembly is not good. It is just that the probability of problems is high, but there is a warranty and you are not afraid of it. Trouble yourself! ! ! That's it for the basic summary! ! !
The LCD TV screen is damaged and can be replaced. However, this needs to be replaced by the TV manufacturer, mainly because the LCD TV screen size, specification, model, and whether the backlight uses LED, or the number of lamps, the number of lamps, etc. are different. Generally, the daily home appliance repair department There is no ready-made screen to replace.
The price of LCD screens of LCD TVs is generally 70% of that of LCD TVs. Manufacturers that are naturally damaged during the warranty period can replace them for free, but if they are over the warranty period or artificially damaged, they need to pay for repairs.
How to check if the LCD is malfunctioning:
1. Observation method
You can check the faults of the LCD display by observation method, and you can check the obvious problems of the display by seeing, touching, touching, and nose. Observe not only carefully, but also comprehensively. The usual observations include: the surrounding environment (including power supply environment, other high-power electrical appliances, magnetic field conditions, temperature/humidity environment, environmental cleanliness, etc.).
And whether there are abnormal phenomena such as deformation, color, and peculiar smell inside the indicator, such as whether the fuse is blackened, whether the filter capacitor is abnormal, and there is no obvious virtual solder joint. By observing and searching for significantly damaged components, you can roughly determine the size and scope of the problem, and even find the problem immediately.
2. Replacement method
You can also use the replacement method to check the failure of the original LCD TV, which is also a repair method to find out the component that has the problem (good components should be of the same model as the components that may have problems).
Firstly, check whether there is any problem with the line connected to the component that may have a problem, and then check whether the power supply is normal, then replace the component that may have the problem, and then replace other components related to it. Complicated sequence.
3. Current measurement method
It is also possible to repair the circuit by measuring the current. If it is a way to measure the load current and working current of the body tube and IC chip, use this method to detect whether the integrated circuit, transistor and power supply load are normal.
If the working state of the transistor or IC chip is normal, then the measured load current should be normal. If the measured current changes greatly compared with the normal value, then the circuit may have a problem, and you can focus on it. .
4. Voltage measurement method
The voltage measurement method is also an inspection method that is often used. It mainly measures the working voltage of circuits and components to determine the problematic parts and components. For example, test whether the +300V DC voltage in the power supply circuit is normal, whether the starting voltage is normal, whether the protection circuit is active, whether the output voltage is normal, etc.
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